replaceRE to extract part of a URL

[alexandros]

You need to escape it properly. See:

Regex invalid syntax

Hello, I’m trying to remove from a string comment data with a regular expression, so I do replaceRE "(/\*([^*]|[\r\n]|(\*+([^*/]|[\r\n])))*\*+/)|(//.*)" "" . But I get the error “invalid syntax” but I have tested the regular expression on http://www.regexplanet.com/advanced/golang/index.html https://regex-golang.appspot.com/assets/html/index.html and both tools returns the correct result